The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 2014
Filed:
Feb. 16, 2011
Shinji Santo, Kosai, JP;
Seiya Yokoyama, Toyohashi, JP;
Yoji Yamada, Hamamatsu, JP;
Yoshiaki Takemoto, Toyohashi, JP;
Shigemasa Kato, Toyohashi, JP;
Kenta Goto, Hamamatsu, JP;
Shinji Santo, Kosai, JP;
Seiya Yokoyama, Toyohashi, JP;
Yoji Yamada, Hamamatsu, JP;
Yoshiaki Takemoto, Toyohashi, JP;
Shigemasa Kato, Toyohashi, JP;
Kenta Goto, Hamamatsu, JP;
ASMO Co., Ltd., , JP;
Abstract
A controller for use with a motor including a stator, around which three-phase coils are wound, and a rotor, which includes a magnet functioning as a first magnetic pole and a salient pole of a core functioning as a second magnetic pole. The controller supplies the three-phase coils with excitation currents having a predetermined phase difference from one another to drive and rotate the rotor. The controller includes a current adjustment unit that adjusts a fundamental wave current using high-order currents for third order and ninth order components in a q-axis to reduce torque ripple. The excitation current is generated based on the fundamental wave current adjusted by the current adjustment unit.